文献类型：期刊文献

英文题名：A simple one step approach to preparation of γ-MnOOH multipods and β-MnO2 nanorods

作者：Jia, Yanjin[1]; Xu, Jian[1,2]; Zhou, Lihui[1]; Liu, Honglai[1]; Hu, Ying[1]

机构：[1] Lab for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Institute of Measurement and Testing Technology, Shanghai, 201203, China

年份：2008

卷号：62

期号：8-9

起止页码：1336

外文期刊名：Materials Letters

收录：EI(收录号：20080411052990)

语种：英文

外文关键词：Hydrothermal synthesis - Manganese compounds - Nanocrystals - Oxidation - Scanning electron microscopy - X ray powder diffraction

摘要：Multipod-like γ-MnOOH and rod-like β-MnO2 nanocrystals are synthesized by oxidization of manganese sulphate hydrate (MnSO4·H2O) using sodium chlorate (NaClO3) as an oxidizing agent in a simple hydrothermal reaction system in the absence of any templates, catalysts, or organic reagents. The powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) are used to characterize the as-prepared products. Based on the results of XRD and SEM, multipod-like γ-MnOOH can be transformed into rod-like β-MnO2 nanocrystals via one step synthetic route by simply increasing the reaction time while other conditions are kept constant. And a possible transfer mechanism via a nucleation-dissolution-anisotropic growth-recrystallization process is presented. ? 2007 Elsevier B.V. All rights reserved.